State Key Laboratory of Clean Energy Utilization, Department of Energy Engineering Zhejiang University, Hangzhou 310027, PR China.
Bioresour Technol. 2011 Jan;102(1):367-71. doi: 10.1016/j.biortech.2010.05.083. Epub 2010 Jun 26.
Cellulose has been used in two-chamber microbial fuel cells (MFCs), but power densities were low. Higher power densities can be achieved in air-cathode MFCs using an inoculum from a two-chamber, aqueous-cathode microbial electrolysis cell (MEC). Air-cathode MFCs with this inoculum produced maximum power densities of 1070 mW m(-2) (cathode surface area) in single-chamber and 880 mW m(-2) in two-chamber MFCs. Coulombic efficiencies ranged from 25% to 50%, and COD removals were 50-70% based on total cellulose removals of 60-80%. Decreasing the reactor volume from 26 to 14 mL (while maintaining constant electrode spacing) decreased power output by 66% (from 526 to 180 mW m(-2)) due to a reduction in total mass of cellulose added. These results demonstrate that air-cathode MFCs can produce high power densities with cellulose following proper acclimation of the inoculum, and that organic loading rates are important for maximizing power densities from particulate substrates.
纤维素已被用于双室微生物燃料电池（MFC）中，但功率密度较低。使用来自双室水相阴极微生物电解池（MEC）的接种物，可以在空气阴极 MFC 中实现更高的功率密度。使用该接种物的空气阴极 MFC 在单室和双室 MFC 中分别产生了 1070 mW m(-2)（阴极表面积）和 880 mW m(-2)的最大功率密度。库仑效率范围为 25%至 50%，根据总纤维素去除率为 60-80%，COD 去除率为 50-70%。将反应器体积从 26 毫升减少到 14 毫升（同时保持电极间距不变），由于添加的纤维素总量减少，功率输出降低了 66%（从 526 毫瓦/平方米减少到 180 毫瓦/平方米）。这些结果表明，空气阴极 MFC 可以在适当驯化接种物的情况下用纤维素产生高功率密度，并且有机负荷率对于最大化颗粒状基质的功率密度很重要。
